Here you'll see some photos taken today of a calculator that was bought in 1985. The display shows that the power is on and the calculator is working.
The thing is - THE BATTERIES HAVE NEVER BEEN CHANGED! HONEST!
Yes, it still has the original Sharp batteries (see second photo).
I suppose the calculator was used extensively in the first 3 or 4 years for exams and such and then used at home whenever something wanted adding up.
The batteries seem to have some kind of plastic wrap around them and have never leaked or anything.
Perhaps batteries these days are made to fail after a certain time so that one has to buy more?
[edit] Perhaps I didn't say explicitly, but yes, it is my calculator - this is not just an interesting article I found on the net somewhere...
Perhaps they're decoy batteries to divert your attention from the SC6900 series micro-reactor (4-A model) seen at the bottom of the second photo.
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